Mismatch negativity (MMN) is a component of the auditory event-related potential (ERP) that is elicited during a passive oddball paradigm where task-irrelevant infrequent deviants are presented in a stream of more frequent standard stimuli. MMN is believed to index a pre-attentive stage of auditory information processing closely linked to N-methyl-D-aspartate receptors (NMDAR) function. Ketamine is thought to act primarily as an NMDAR antagonist, has been used in clinical trials to model the symptoms of schizophrenia and is increasingly used in the clinic to treat depression.
[Editorial] Putting placebo effects in a new light
Placebo effects have puzzled and intrigued researchers for decades but, despite playing an important role in modern trial design and treatment development, they remain relatively mysterious. With the development of new treatments in psychiatry, especially psychedelic-assisted psychotherapy, placebo effects are under the spotlight. In this issue, The Lancet Psychiatry presents two Review articles by Matthew Burke and colleagues on reconceptualising placebo and nocebo effects.
[Comment] Youth mental health in central Asia: research needs
Little research has been published on mental health difficulties in young people (aged 10–24 years) living in central Asia,1 a region comprising Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan. As researchers and representatives from academic, non-governmental, governmental, and UN organisations working in Kyrgyzstan and Uzbekistan and beyond, we are noting an increasing number of young people reporting emotional and behavioural symptoms in central Asia in published articles2 and from our own observations.
[Comment] Magnetic seizure therapy: balancing efficacy and cognition
Few treatments in psychiatry match the antidepressant efficacy of convulsive therapy. Yet despite this therapeutic potency, persistent stigma and concerns about cognitive adverse effects—particularly autobiographical memory disturbance associated with electroconvulsive therapy, ECT—continue to limit its wider adoption.1 This tension is especially consequential in treatment-resistant depression (TRD), where convulsive therapies remain among the most effective treatments.2
[Comment] Assessing adolescents’ use of artificial intelligence in psychiatric practice
In a recent clinical encounter with one of the authors (AP), a young boy with autism insisted that his mother hated him—because ChatGPT said so. After asking whether a parent who sets limits must dislike their child, he interpreted the bot’s confident, literal response as truth. By the time the boy arrived at the clinic, this exchange had already reshaped his affect, relationships, and risk. Encounters like this are increasingly common, and many adolescents now present with beliefs—and sometimes safety concerns—influenced by generative artificial intelligence (AI).
[Comment] Psychonauts: reimagining recovery in forensic psychiatry
Inside a locked forensic ward at the University Psychiatric Hospital Vrapče—Croatia’s oldest and largest psychiatric institution—patients began building a world of their own: one puppet, one frame at a time. Psychonauts, an 8-minute stop-motion film co-created by forensic psychiatric in-patients, started as an unassuming art therapy exercise but gradually evolved into a powerful act of collective authorship. Originating behind secure doors, Psychonauts is now on its own journey, reaching spotlights, being celebrated at prestigious international festivals (including Special Mention at Annecy, 2025, and Best Short at Guanajuato, 2025), currently even in consideration for an Oscar.
Determinants of Digital Health Literacy Among Patients With Serious Mental Illness: Cross-Sectional Survey
Background: Individuals with serious mental illness increasingly use digital devices and the internet to access health information and services but often face challenges when navigating digital tools, which may limit the benefits they receive from online health resources and digital health care services. Objective: The objective of our study was to assess digital health literacy among individuals with serious mental illness and identify factors influencing this literacy. Methods: Participants were recruited, using convenience sampling, from 2 psychiatric clinics, 1 day-care center, and 4 halfway houses in Taipei, Taiwan, between May 2024 and February 2025. Self-reported data were collected using a survey that incorporated the eHealth Literacy Scale, the Attitudes Toward Computer/Internet Questionnaire, and the Mobile Device Proficiency Questionnaire. Generalized linear modeling was applied to identify factors associated with digital health literacy. Results: Among 255 participants included in the analysis, 83.5% (n=213) reported owning at least 1 digital device. Digital health literacy was significantly lower among individuals who reported greater perceived difficulty in using digital tools (=−1.533, 95% CI −2.350 to −0.717; <.001) and higher distrust in online information (=−0.986, 95% CI −1.916 to −0.056; =.04). By contrast, greater mobile device proficiency (=0.144, 95% CI 0.008‐0.281; =.04) and self-efficacy (=1.777, 95% CI 0.376‐3.177; =.01) were positively associated with digital health literacy. Conclusions: Despite widespread device ownership, digital health literacy was varied and generally suboptimal among patients with serious mental illness. Perceived difficulty and distrust emerged as major barriers; proficiency and self-efficacy facilitated higher literacy. These findings highlight the need for mental health professionals to integrate tailored digital skills training, confidence-building strategies, and ongoing support into digital health interventions for individuals with serious mental illnesses.
<![CDATA[Discover how art, film, and poetry return to the APA meeting—and why psychiatrists practice creativity in every patient encounter.]]>
Pregnancy Sickness Study Identifies New Genetic Links
The University of Southern California (USC) research team that identified the hormone-encoding gene GDF15 as a key driver of pregnancy sickness has identified nine additional genes linked to its most severe form, hyperemesis gravidarum (HG). Six of the identified genes had not been previously linked to the condition.
The Keck School of Medicine of USC team and international collaborators conducted a genome-wide association study (GWAS), scanning the entire genome for differences between women who developed HG during pregnancy and those who did not. They analyzed data from more than 10,000 women with the condition and more than 450,000 controls across European, Asian, African, and Latino ancestries. Their findings offer new clues about the condition and new hope for those affected.
Marlena Fejzo, PhD, a clinical assistant professor of population and public health sciences in the Center for Genetic Epidemiology at the Keck School of Medicine, led the present study and earlier research linking GDF15 to HG. Fejzo told GEN, “The study is much larger than previous studies and on a more diverse population allowing for identification of new genes associated with HG … The new genes give us new directions to explore for prediction, diagnosis, treatment, and response to therapies.”
Fejzo is first author of the team’s published report in Nature Genetics (“Multi-ancestry genome-wide association study of severe pregnancy nausea and vomiting”), in which the team stated, “Potential roles for candidate genes in appetite, insulin signaling, and brain plasticity provide pathways to explore etiological mechanisms and therapeutic avenues.”
HG, which affects about 2% of women, causes nausea and vomiting so severe that eating can become extremely difficult. “Most pregnancies are affected by nausea and vomiting (NVP), but in 0.3–10.8% of pregnancies the symptoms can be severe enough to cause maternal weight loss and adverse maternal and fetal outcomes,” the authors wrote. HG in its most severe form can even be life threatening.
HG was long misunderstood and often dismissed as psychological, growing evidence shows that it has a strong biological and genetic basis and can lead to severe malnourishment, putting both mother and baby at risk. Current treatments for HG are frequently ineffective in improving patient symptoms, the authors further pointed out, and so increase the risk of pregnancy termination, postpartum depression, and suicidal ideation, along with other maternal and offspring comorbidities. “Therefore, understanding of HG etiology is critical to begin to address the negative impact severe NVP has on maternal and child health.”
While historical hypotheses have previously centered around human chorionic gonadotropin (hCG), recent large-scale genetic studies have implicated the GDF15 gene encoding growth differentiation factor-15—a hormone associated with nausea and vomiting, the authors further pointed out. Earlier research by Fejzo and an international team had shown that the link between HG and GDF15 lies in women’s sensitivity to the hormone. They found that women exposed to lower levels of the hormone before pregnancy because of a mutation in the gene experience more severe symptoms, while women exposed to higher levels of the hormone before pregnancy have less severe nausea and vomiting symptoms.
“GDF15 was identified as the greatest genetic risk factor for HG in both a genome-wide and an exome-wide association study, and a rare mutation in GDF15 was associated with a greater than tenfold increased risk for HG,” the scientists noted in their newly reported study. Fejzo explained to GEN, “The mutation in GDF15 is rare. People who carry the mutation have abnormally low levels of GDF15 when they are not pregnant and that increases their risk of being hypersensitive to it during pregnancy when it is produced in massive amounts by the placenta.”
Commenting on their prior work implicating a role for GDF15 and HG, Fejzo further explained to GEN, “In our first GWAS study we found the association between the GDF15 gene and HG. Next, we published a whole-exome sequencing study that identified a mutation in GDF15 associated with HG. Then we published our study in Nature which provided strong evidence that hypersensitivity to the rise of GDF15 in pregnancy (due to low pre-pregnancy GDF15 in circulation) is the main driver of the condition.”
For their newly reported study the researchers carried out a multi-ancestry genome-wide association study of 10,974 HG/excessive vomiting in pregnancy cases and 461,461 controls across European, Asian, African, and Latino ancestries from nine contributing studies.
The results identified 10 genes that were linked to HG, including four that had previously been identified, and six new genes. “Because this is the largest study of HG ever conducted, we’ve been able to tease out important new details that were previously unknown,” said Fejzo. “The fact that we’ve studied women from multiple ancestry groups suggests that these results may be generalizable across a broad population.”
The four genes previously identified were growth differentiation factor 15 (GDF15), GFRAL, which produces the receptor for the GDF15 hormone of the same name, and IGFBP7 and PGR, both of which are involved in development of the placenta. The strongest link by far was to GDF15, which rises sharply during pregnancy. “We know that GDF15 and it’s receptor GFRAL are the main drivers and are in a signaling pathway that causes aversions, nausea, and vomiting,” Fejzo told GEN. “More work needs to be done to explore the other associations, but since studies suggest manipulating progesterone and/or IGFBP7 may not be safe in pregnancy, current studies are focusing on the GDF15 pathway.”
The six newly identified genes offer further clues that might help explain the basis of HG or point to new ways of treating it. They include FSHB, TCFL72 SLITRK1, SYN3, IGSF11, and CDH9. “Now that we’ve more than doubled the genes associated with HG, we can dig deeper into the biology behind this condition, as well as new possible pathways for treating it,” Fejzo said. Speaking to GEN, the researchers noted, “Because the new associations are novel, we need to understand the roles they may play in normal pregnancy and then compare that to pregnancies affected by HG.”
Of the newly identified genes, TCF7L2 stands out because it is one of the strongest genetic risk factors for type 2 diabetes and is also associated with gestational diabetes. “This is a brand-new target, and it’s not yet clear what it’s doing in pregnancy,” Fejzo said. In further commentary to GEN, Fejzo added, “The TCF7L2 gene is a type 2 diabetes-associated gene and a transcription factor that may control glucagon-like peptide-1 (GLP-1) expression and has been associated with liraglutide effects resulting in greater weight loss in obesity. So understanding its role in that rapidly evolving therapeutic arena has potential.”
Several of the other genes identified are involved in appetite and nausea, as well as brain plasticity, or how the brain learns and adapts to new information. Fejzo suggests the brain may learn to associate certain foods with feeling sick, leading to strong, lasting aversions during pregnancy. More research is needed to explore this possibility. “Other genes are associated with learning flexibility so we hypothesize that they may play a role in conditioned taste aversion and may provide new targets to alter or dampen learned aversions,” Fejzo told GEN. Historically, people believed the pregnancy hormone hCG was the cause, but we found no evidence to support that and instead, fascinatingly, we found a link to the follicle stimulating hormone receptor.”
Of the ten candidate genes six—GDF15, GFRAL, IGFBP7, PGR, TCF7L2 and SYN3—have been linked with cachexia—a wasting condition with similar symptoms to HG, including loss of appetite, weight loss and muscle wasting, the scientists noted. “Manipulation of GDF15, GFRAL, IGFBP7, PGR and TCF7L2 in animal models has shown effectiveness in reducing symptoms of cachexia. Thus, assuming analogous functions for these factors in HG, there is both genetic and biological support for causal and potentially reversible contributions for these genes in NVP.”
The researchers also found that some genes linked to HG were associated with other pregnancy outcomes. “This study also identified individual associations between risk genes and adverse outcomes including shorter pregnancy duration, pre-eclampsia, and birth weight,” they noted.
Several medications are available for treating HG, but even the most effective, Zofran, only partly relieves symptoms for about half of patients. The new findings reveal new potential treatment targets and could possibly also help match existing medications to patients based on their genetic profiles. “The ten genetic associations provide intriguing avenues to advance our understanding and pursue therapeutic pathways for a common pregnancy condition that in its most severe form is associated with substantial morbidity and even mortality for mothers and exposed offspring,” the scientists concluded.
Fejzo and her team just received approval to launch a clinical trial of metformin, a widely used diabetes medicine that increases GDF15 levels. The study will test whether taking metformin before pregnancy can desensitize women to the hormone, potentially reducing nausea and vomiting or preventing HG in women who have had it before. GEN was told, “We will be initiating a clinical trial to increase GDF15 prior to pregnancy in patients with a history of HG and planning to conceive to desensitize them to the hormone’s rapid rise in early pregnancy. We and others have shown preliminary evidence that this approach may work as in our retrospective study pre-pregnancy metformin use was associated with a significant reduction in HG risk.”
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Cancer Cell Apoptosis Avoided by Membrane Oligomerization
Apoptosis in cancer cells may be easier to unleash than previously thought, according to new research led by scientists at Umeå University and collaborators. That finding could open up more cancers to treatment with anti-apoptotic drugs. The team used neutron reflectometry (NR) and ATR-FTIR to detail communication between proteins in and around the mitochondrial outer membrane (MOM).
“We use neutrons as a kind of ‘x-ray’ magnifying glass to study how various proteins talk to each other inside the cell,” Gerhard Gröbner, PhD, told Inside Precision Medicine. He is a professor at Umeå University and senior author of a new study that looks at the role of the Bax protein in apoptosis. The findings appear in ACS Chemical Biology.
Apoptosis is a form of programmed cell death that removes old or damaged cells, enabling the immune system to function properly. When apoptosis does not work as it should, as in many cancers, cells can divide uncontrollably and form tumors.
Many cancer therapies (e.g. drugs and radiation) are designed to trigger apoptosis in tumors. But there are also many aggressive and often incurable cancers that current anti-apoptotic therapies do not work on due to these tumors’ intensive use of survival proteins, such as Bcl-2 and its relatives, which can stop apoptotic death.
“Finding new drugs to inhibit Bcl-2 and its relatives in a wider sense would thus help treat more cancers. Currently only one Bcl-2 drug is available, and it is used for very specific leukemia,” said Gröbner.
“Going forward we will test a range of potential drug candidates to block Bcl-2 to release cell-killing proteins like Bax again to improve therapies,” he added.
The cell‑killing protein Bax protein is one of the most important proteins controlling apoptosis. Once activated, Bax can initiate apoptosis by forming pores in the membranes of mitochondria. Another key protein from the same family, the cell‑protective protein Bcl‑2, instead prevents Bax from killing tumor cells. In nearly half of all human cancers, one of the underlying problems is an increased production of Bcl‑2, which promotes tumor growth and often leads to poor response to therapy.
“In our research, we have used advanced neutron experiments to show how Bcl‑2 protects cancer cells by blocking the death‑inducing proteins that are most often activated by therapy,” said Gröbner.
The team used NR and ATR-FTIR to elucidate the molecular communication between those proteins in and around the mitochondrial outer membrane (MOM). The spatial and temporal changes across model MOM surfaces were resolved during the interaction of Bax with Bcl-2. The NR-derived membrane surface Bax distributions suggested that Bcl-2 mediated Bax sequestration through both Bcl-2/Bax heterodimerization and Bax/Bax oligomerization. Kinetic analysis revealed a two-step process: rapid formation of Bcl-2/Bax heterodimers, followed by slower Bax oligomerization on these complexes
The experiments show that Bcl‑2 can capture and bind several Bax proteins at the same time. This makes the inhibition of cell death more efficient than previously thought. Cancer cells do not need to produce extremely large amounts of Bcl‑2 to protect themselves—even a moderate increase can be sufficient.
The researchers also investigated how the composition of the mitochondrial membrane affects the interaction between the proteins. They found one particular lipid, cardiolipin, can promote apoptosis and help Bax form pores in the membrane. However, even in membranes containing cardiolipin, a sufficiently high level of Bcl‑2 can still prevent cell death.
“In the longer term, this type of knowledge could open up new opportunities for cancer treatment, for example by targeting Bcl‑2 and its protective function,” says Gröbner.
The study was carried out in collaboration between researchers from Umeå University, Lund University, the European Spallation Source (ESS) in Lund, the ISIS Neutron and Muon Source and Diamond Light Source in the United Kingdom, and the Institut Laue‑Langevin (ILL) in France.
The post Cancer Cell Apoptosis Avoided by Membrane Oligomerization appeared first on Inside Precision Medicine.